Double suction centrifugal pump



Oct. 11, 1932. M. M. KLOSSON 1,831,680

. DOUBLE SUCTION CENTRIFUGAL PUMP Filed Jan. 5, 1930 2 Sheets-Sheet l A rra @MEK:

Oct. 11, 1932.

M. M. KLOSSON DOUBLE SUCTION CENTRIFUGAL PUMP Filed Jan. 3, 1930 2 Sheets-Sheet 2 //Vl E/V roe 2 %4 fwd Patented a. 11, 1932 umTEosTATEs PATENT OFFICE 'MIGHAEL M. KLOSSON, OF KENMORE, YORK, ASSIGNOR T0 BUFFALO STEAM PUMP 8 COMPANY, OF NORTH TONAWANDA, NEW YORK DOUBLE SUCTION CENTRIFUGAL IPUMP Application filed January 3, 1930; Serial No. 418,224.

to centrifugal I I vided'with a suction'or inlettube or duct extending toward opposite sides of the pump,

"misc that either or both ends of the tube or duct'ma'y be used to conduct liquid to the pump; also to provide a mounting for a pump of this 'kind by means of which the pump is supported by the inlet pipes or ducts;

also to provide a pump of this kind in which the discharge passage extends through, but does not shut oi the suction inlet passage of the pump; also to provide a centrifugal pump in which at. least a part ofthe pump '25 housing. extends into the suction or inlet fduct, to facilitate the delivery of liquid to be pumped to thepump housing; also'to provide a centrifugalpump with means of improved construction for preventingthe liquid being pumped from passing lengthwise of the shaft tothe shaft bearings; also to improve the construction of centrifugalpumps in other respects hereinafter specified.

In the accompanying drawings.

Fig. 1 is a side elevation of a centrifugal pump and the mounting thereof, embodying this invention; a I v i Fig. '2 is atransverse sectional elevation thereof, on line22, Fig. 1. 1 V

Fig. 3 is a transverse section thereof, on v ,line 3 3,Fig. 4:; and

-Fig. 4: is a central sectionalelevation of the pump on line 41- 1, Fig. 1, on an enlarged scale. x I

.45 In the drawings a single-stage, double suction centrifugal pump is illustrated,.but it will be understood'that the invention isequally applicable to a multi-s'tage ormulti-pump.

The particular pump shown in the accompanying drawings and forming one em,-

bodiment of this invention, includes an inlet or suction duct or conduit A having at least a part of the housing B of the centrifugal, pump arranged within the suction duct and preferably formed integral therewith, this housing. including a discharge passage or duct C, which may also be formed integral with the housing and with the suction or inlet passage A. The pump housing shown extends substantially through the middle of 5 the inlet duct A, and in order to allow ample space between the sides of the suction duct and the pump housing and discharge duct, so that the liquid-in this suction duct may pass to either side of the discharge passage, 55 the intermediate portion of the duct may be enlarged or bulged out as shown at a, the

ends of the duct being of circular crosssection. In the particular constructlon shown,

the'pump housing is split horizontally, the lower portion D of the, housing being arranged'exterior to the suction duct A, and having afiange d which may be bolted or otherwise suitably secured to a flange b of thatportion of the housing which is formed integral with the suction duct A. A pump housing of other construction may be em;- ployed, if desired. V

In order to facilitate the mounting of the pump, the suction duct A may be supported on suitable beams or supports E, which may be frame members of a vehicle, or which may be a part of a fixed foundation. The suction ,duct A may either be elongated so as to rest upon the frame members or supports E, or, 35 as in the construction shown, extensions F and F of the suction duct A may be provided,

1 these extensions being in the form of tubes having'fianges suitably bolted to corresponding flanges at the ends of the suction duct A, or otherwise secured thereto. When this pump isvused in connection with fire extinguishing apparatus, the ends of the extensions F and F of the suction duct are located r l 15 E tlons sions in the construction shown are provided Q with lugs for other'suitable means to facilitate securing the extensions to either the top 7 or bottomfaces of the supports or frame members E. i n

' By means nof thei arrangement described, it will be 'obvious that in caseit desired to have the centrlfugal pump d1scharge the liquid downwardly, it is merely necessary H to disconnect the suction intake memberA from the tubular. extensions F and'F, and

invert the suction duct A together withthe pump.

The pump itself is shown more in' detail' 4, which shows clearly the two porand D of-the housing; This housing encloses-the vanes or bladesIO ofthe impeller G, which issuitab'ly secured to a shaft 11 which maybe driven in any suitablemang ner; The impeller is'held againstlengthwise movement on the shaft 11 by means of sleeves 12secured on the shaft. The housing has;

the usual discharge passage or duct- 14 into which the vanes or impellers 10 discharge the liquid which is'being pumpedpand which terminatesiin the tangential discharge "duct 'CJThe pump housing is provided with openings 15 at opposite sides of the impeller,

so thatliquid from the suction intake duct A canp'ass'to the impeller from either or both sides thereof throughbothopenings 15; l The "removablepart Dof'the housing is provided with hollow enlargedportions 16, whi'ch com- 'municatewith the inlet duct A and constitute a art thereof and through vvhic hfli quid t T Pumped can pass to the openings 15 Y' 7 The o sing is provided at opposite-sidesf with bearing extensions 17 in which suitable sleeve, ball or roller bearings for the pump shaft ll'are 7 arranged, ball bearings 18 being shown in the construction illustrated. These bearing extensions 17 also contain stuflin'g boxes of 'anylsuitable or desired'construction for keeping the'liquid which is being pumped from reaching-the bearings 18, a nd for keep- 7 ing lubricant from the bearings from enter- "ing thehousing of the pump. 1 Since the stuffing boxarrangements are the same in both it "bearingfextensions 17,only one of these arrangements will be described. t

7 The particular stuffing box" or packing arrangementshown includes a flanged disc 20 "made of flexible material,such as rubber 'or' "leather, and has an inner fiange'or lip 21 ex tending toward the impeller of the pump in such a-manner that liquid pressure acting orifthe" packing ring 20rwi11 tendito press the inner fl'ange or lip 21, tightly -againsti the q i sleeve12, I and" thus prevent leakage beyond this packing'ring. The packingring is held gin its operative position-inthebearing extension 17 by means of'a metal positioning ring "22,;one face/of; which engages [the packing .ring 20,"and theother face'of which engages a radially extendingportion of" another similarpacking ring 24, also having an inner flange or lip 25 functioning in the same manner as the flange or lip 21 of the packing ring 20. Another similar packing ring 27 is pro- ,7

' vided outwardly beyond the packing ring 2 andiis arrangediso that 'lits inner; flange or lip extends outwardly away fromv the im-- peller to prevent theeflow of liquid in a direction toward the impeller, thisring being employed to prevent oil from the bearing 18 7 in}; rings may be-drained. To facilitate the 5 7 draining of liquid through the orifice 32, the *drain ring has inner and outer annular grooves'33 and 34: connectingwiththe holes" ,31, so that liquid passing alongthe'sleeve 12 ,passes into groove 33 and then flows through :thejholes 31t'o theouter groove 34: and thence e to the orificey32. '"If desired, a drain pipe 35 may be connected with this orificef32, The several partsof thestufling box arrangement are securedin place byfany suitable means one means as shown being an externally. threaded ring 36 engaging a co'rr'esponding threaded portion of the bearing extension '17 ofthe pumpfi races pressed against the outerends ofthe sleeves 12, forexamplebymeansof nuts 37 engaging screw threaded portions of the shaft- 11. jA'cap 38 closes the outer end of one of the bearing projections .17 and a corresponding ioo cap 39, provided with 5 an opening through which the shaft 11 extends, coversthe end of the other bearingextension 17.

By means of the'stufiing box andbearing arrangementdescribed, the bearings are arrangedas' closely together as is possible, so, that the shortest possible distance between each of thebearings is obtainedandajcorrect and true operation ofthei'impeller shaft results. This construction also has the-advani tags thatthe-bearingscan bearranged in'the integral extensions 17 of the pumphousing or suction inlet so that theseflbearingsican be more readily kept in 'aline'ment with the'axis of rotation of'thepump shaft,andtby providinga stufling box arrangement which positively prevents the liquid being pumped froin passing to the bearings, this construction: is made possible, so thatthe use of bearings separated 'by a, space 'ordistance'from' the pumpf hou's'ingare not necessary. 2 This arrangement is particularly desirable in a portablepump whichiis subjected to much more jarring and shocks than is ast'ationary pump.

' 'lhe arrangement described has theadvan Theball bearings 18 shown have their i ner 1 tage that adouble-suction centrifugal pump 'may be employed. This type of pump is more efficient than the single suction pumps heretofore used in fire apparatus and similar portable pumps, and also eliminates the end thrust on the shaft; which is present in all singlesuction pumps.

I claim:

The combination of a substantially straight duct having openings at opposite ends thereof to receive liquid at either or both of said ends of said duct, a centrifugal pump having 1 a portion of its housing arranged Within said a duct intermediate the ends thereof, to receive 'liquid from said duct at both sides of said housing, the other portion of said pump housing being secured to said duct at a peripheral portion thereof and extending toward one side thereof and including passages for liquid from said duct to said other portion of v the housing, and a discharge passage from said housing extending to the opposite side of said duct.

MICHAEL M. KLOSSON. 

